Question

find the value of 3a2 + a, for a=(-1)

Answer 1

Answer:

2

Step-by-step explanation:

3*-1^2=  3

= 3 + -1 = 2

Answer 2

The value of 3a² + a = 2 for a = - 1

Given :

The expression 3a² + a

To find :

The value of the expression for a = - 1

Solution :

Step 1 of 2 :

Write down the given expression

The given expression is 3a² + a

Step 2 of 2 :

Find the required value

Value of the expression 3a² + a for a = - 1 is obtained by putting a = - 1 in the expression

Hence the required value

$\sf = 3 \times {( - 1)}^{2} + ( - 1)$

$\sf = (3 \times 1) - 1$

$\sf =3 - 1$

$\sf = 2$